23 T top Gear

[blown apex]

so with me being supercharged at 12psi
i should be able to pull stock gearing
what should my top speed be
apex gt 10:1 wisecos 192 studs skidoo drivers and
fully clipped track
thank duane

 

[wolfie]

Not to throw a monkey wrench on things, and everyone's setup is different. But my uncle has an Apex ER, slightly lowered, .75 speed track, chisels, etc., and hes done several runs at 126 on the gun, with a 25 tooth top gear, stock bottom. That was in primo conditions with a tail wind, but he's hit 122-124 regularly as well.

 

[MyOutdoors]

I put in the 23 tooth along with Ulmers stage II kit today. I weight 280lbs and have never had my RTX over 115 on the dreamo. I took it for a test today and I'm now hitting 122 on the dreamo and ran out of ice. With me on the sled, I could not pull the 24 tooth gear.

 

[BA APEX]

I put in the 23 tooth along with Ulmers stage II kit today. I weight 280lbs and have never had my RTX over 115 on the dreamo. I took it for a test today and I'm now hitting 122 on the dreamo and ran out of ice. With me on the sled, I could not pull the 24 tooth gear.

is this on all ice or did you have some snow too? on glare ice i see about 2-3 miles less than my son. he is about 135lbs and at the time I was 300lbs.

 

[MyOutdoors]

There was about an 1" of wind blown snow, so my launch had snow and accross the lake was "on/off" snow.

 

[LazyBastard]

we are already bitching about gas milage,and if you gear down on the shorty,it will only get worse,

Shouldn't make any difference. Lower the gearing and it'll shift out further. Maybe add some weight to your primary. Dropping the gearing will increase torque on engagement, will leave the midrange alone, and may help or hinder the top end (depending on what you choose). The trail rider won't see any difference in fuel consumption.

 

[byoffcr]

When lowering the gearing the milage does get worse.. I did it on a couple of my sleds. To run the same speeds as the higher geared sleds it will be running higher rtpms and useing more gas.

 

[BADSLED]

So, with lower gearing I would assume it would take less weight to shift out the primary. Is this correct??

 

[snowbeast]

So, with lower gearing I would assume it would take less weight to shift out the primary. Is this correct??

No not really,you may want to add tip weight,as the lower gear in effect keeps you reving higher through out your shift curve,to maintain your perfect shift rpm,add weight or lighten your primary shift rate spring. And in all my years of testing under full load at wo you will use more fuel with lower gearing,and hook up becomes a problem,so the more you spin your track,and the less distance you go for the same hourly fuel flow,the more juice you use..

 

[LazyBastard]

When lowering the gearing the milage does get worse.. I did it on a couple of my sleds. To run the same speeds as the higher geared sleds it will be running higher rtpms and useing more gas.

That would be because you didnt compensate for it in the clutching. At speed rpm's will be the same.

 

[byoffcr]

And in all my years of testing under full load at wo you will use more fuel with lower gearing,and hook up becomes a problem,so the more you spin your track,and the less distance you go for the same hourly fuel flow,the more juice you use..[/quote]

I agree.

 

[SRXracer]

I tried out the 23 gear this weekend, i saw 128 (speedo) with the 23, and 128 with the stock 24. No change as far as i could tell, and this was in about a half mile run on a ice road. One might have gotten there a little bit faster, but that was tough to judge without another sled there. The 128 was with an ulmer 2 kit, i threw the stock stuff back in and only saw about 124-5.

For the guys saying they aren't seeing these speeds... earlier in the day, i could barely break 110 running on a lake with a few inches of snow on it - it is all in the conditions that you're running in!